It is commonly used to describe:
* Software updates: Software updates delivered wirelessly to devices like smartphones, tablets, and smart TVs.
* Broadcast television: TV signals transmitted wirelessly through the air to antennas, as opposed to cable or satellite.
* Travel booking: Online travel agencies (OTAs) like Expedia and Booking.com that allow customers to book flights, hotels, and other travel arrangements directly.
The specific meaning of OTA will depend on the context in which it is used.